package com.itheima.reggie.controller;

import com.itheima.reggie.common.R;
import com.itheima.reggie.utils.AliOSSUtils;
import lombok.extern.slf4j.Slf4j;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.UUID;

@RestController
@RequestMapping("/common")
@Slf4j
public class CommonController {
    /**
     * @author: 陈家乐
     * @email：68668646@qq.com
     * @date: 2023/2/9 14:24
     */
    @Value("${reggie.path}")
    private String basepath;
    @Autowired
    AliOSSUtils aliOSSUtils;

    /**
     * 上传
     * 请求url地址：/common/upload
     * <p>
     * 请求方式：POST
     */
    @PostMapping("/upload")
    public R<String> upload(MultipartFile file) throws IOException {
        log.info(file.toString());
        //原始文件名
        String originalFilename = file.getOriginalFilename();
        //拿到后缀名
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));
        //使用UUID重新生成文件名，防止文件名称重复造成文件覆盖
        String fileName = UUID.randomUUID().toString() + suffix;
        //调用工具类上传到阿里云oss存储
        aliOSSUtils.uploadFile(fileName, file.getInputStream());
        return R.success(fileName);

    }

    /**
     * 下载
     * 请求url地址：/common/download
     * <p>
     * 请求方式：GET
     */
    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) throws IOException {
        log.info("下载图片:{}",name);
        //调用工具类从阿里云oss存储下载
        aliOSSUtils.downloadFile(name,response.getOutputStream());
    }

    /**
     * 上传2
     * 请求url地址：/common/upload
     * <p>
     * 请求方式：POST
     */
    @PostMapping("/upload2")
    public R<String> upload2(MultipartFile file) throws IOException {
        log.info(file.toString());
        //原始文件名
        String originalFilename = file.getOriginalFilename();
        //拿到后缀名
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));
        //使用UUID重新生成文件名，防止文件名称重复造成文件覆盖
        String fileName = UUID.randomUUID().toString() + suffix;
        //创建一个目录对象
        File dir = new File(basepath);
        //判断目录是否存在
        if (!dir.exists()) {
            dir.mkdirs();
        }
        file.transferTo(new File(basepath + fileName));
        return R.success(fileName);

    }

    /**
     * 下载2
     * 请求url地址：/common/download
     * <p>
     * 请求方式：GET
     */
    @GetMapping("/download2")
    public void download2(String name, HttpServletResponse response) throws IOException {
        //输入流，通过输入流读取文件内容
        FileInputStream inputStream = new FileInputStream(new File(basepath + name));
        //输出流，通过输出流将文件写回浏览器
        ServletOutputStream outputStream = response.getOutputStream();
        IOUtils.copy(inputStream, outputStream);
    }
}
